Winnipeg River generating stations: Seven Sisters

Seven Sisters Generating Station is Manitoba Hydro's largest producer of electricity on the Winnipeg River. Located about 90 km northeast of the City of Winnipeg, it is fondly and respectfully described by engineers who designed and built it as the river's mightiest generating station.

Seven Sisters, which is about 72 km from Lake Winnipeg, was built in 2 stages. The first stage, begun in July 1929, featured the construction of a powerhouse. When completed in August 1931, it housed the first 3 of 6 turbine generators (called units) which produced a total of 75 MW.

Stage two began later, in 1948, 3 years after World War II had ended. In 1952, the sixth and final unit was placed in service. These additional units doubled the generating station's total megawatt production.